if (value == null || value.length() == 0) {
// CLK-289. If a session attribute exists for the
// SUBMIT_CHECK, but no request parameter, we assume the
// submission is a duplicate and therefore invalid.
LogService logService = ClickUtils.getLogService();
logService.warn(" 'Redirect After Post' token called '"
+ submitTokenName + "' is registered in the session, "
+ "but no matching request parameter was found. "
+ "(form name: '" + getName()
+ "'). To protect against a 'duplicate post', "
+ "Form.onSubmitCheck() will return false.");